The ZHP doesn't use special springs. It uses the same springs as any other 330 with the sport package. You might also read up on some of jpr's threads as I believe the pre-2001 sport package was actually firmer than the post-2001 sport package. If your car came with the sport package, this could potentially be a downgrade for you. If you don't have the sport package, then it might meet your goals. Too hard or too bouncy is too subjective.